Swage-shaper for saw-teeth.



S. T. FREAS.

SWAGE SHAPER FOB SAW TEETH.

APPLICATION FILED OCT. 3 1913.

Patented Oct. .27, 1914.

2 SHEBTSLSHEET 1.

THE NORRIS FErERs CO. PHOTO-LITHQ. WASHINGTON. D.

APPLICATION FILED OCT. 3, 1913.

Patented Oct. 27, 1914.

2 SHEETSSHEET 2.

sra'rns PATENT oFFroE.

SAMUEL T;

FREAS, or TRENTON, ivnw JEnsnY, nssrcnon ro nann .DISSTON & sons,

INCORPORATED, OF PHILADELlI-IIA, PENNSYLVANIA, ALCORPORATION OF PENN-SYLVA'NIA.

SWAGE-SHAPER FOR SAW-TEETH. I

Specification of Letters Patent.

PatentedOct. 27, 1914.

Application filed October 3, 1913. Serial No. 793,182.

To all whom it may concern:

Be it known that I, SAMUEL T. FRnAs, a

citizen of the United States, residing in Trenton, Mercer county, NewJersey,have invented certain Improvements in Swage- Shapers forSaw-Teeth, of which the following is a specification. One object ofmy'invention is to construct a swage shaper for saw teeth so that it canbe readily applied to the swaged teeth of a saw and operated so as toside dress or size the teeth of the saw, in order that they may be ofuniform width, and shaping the teeth so that they will be undercut atthe rear of the point for the necessary clearance.

A further object of the invention is to construct the swage shaper sothat it can be readily adjusted to accommodate saws of any thickness orspace of teeth.

A still further object of the invention is to make the anvils detachableso that they can be readily dressed or renewed.

These'objects I attain .in the following manner, reference being had tothe accompanying drawings, in which- Figure 1, is a perspective view ofmy improved swage shaper; Fig. 2, is a longitudinal sectional view; Fig.3, is an inverted plan'view; Fig. 4C, is a transverse sectional view onthe line ac, Fig. 2; Fig.5, is a detached perspective view of theanvilcarrying blocks and the anvils detached there from, together withthe; plate on which the blocks slide; Fig. 6, is a detached perspectiveview showing the gage bar and detachable stop; Fig. 7, is a sectionalview on the line 6-4), Fig. 2; Fig. 8, is a perspective view of a swagedsaw tooth; Fig. 9, is a perspective view of a swaged saw tooth shaped bymy improved device; Fig. 10, is a diagrammatical view showing a sawtooth between the two dies; and Figs. 11, 12 and 13 are views ofmodifications.

A swage shaper is designed for the purpose of reducing the width of thepoint of a saw tooth after it has been swaged, so that all of the teethof a saw will be of uniform thickness. The tooth is cut in the ordinarymanner, then the ends of the tooth are swaged by a suitable tool so asto increase the width of the tooth at the end in order that the cuttingedge of the tooth will be of .a greater width than the body of he tooth.

Referring to the drawings, 1 is the body portion of the swage shaper,rectangular in shape in the present instance, and having ribs 2 at theupper edge forming hand grasps, but the body portion may be perfectlyplain, if desired, and a hand hold, as illustrated in dotted lines, maybe used by screwing it into the opening 3 in the body portion.

Arranged to slide in the body portion, toward and from each other, areblocks 4 having longitudinal openings 5 and these openings are threadedto receive the threads of a coarse pitch screw 6, which has right andleft hand threads, as illustrated in Fig. 4. One of the blocks has arighthand thread and the other has a left hand thread so that, when thescrew is turned in one direction, the blocks will be moved toward eachother and, when the screw is turned in the opposite direction, theblocks will be forced apart. M

On the end of the screw 6 is a stem 7 to which a handle 8 is attached bywhich the screw is turned. This stem 7 may be on one side only, as inFig. a, or it may be on both sides, as shown at 7 in Fig. 12, so thatthe tool can be used either by a right hand or a left hand operator.Where a single stem is used the tool will have to be dismantled andthescrew shifted so that the handle will be on the opposite side to thatillustrated in Fig. 4 for a left hand operator.

The two blocks slide in a plate 9 which is shouldered, as illustrated inFig. 5, and tits in the cavity in the body portion 1. Each block isgrooved at 10 to receive the ribs 11 of the body portion 1. These ribs,in the present instance, from an integral part of the body portion, asillustrated in Fig. 1.

The screw 6 has a central plain portion, as illustrated in Fig. 4, oneach side of which is a flange 12. 4

13 is a gage plate extending throughout the length of the device andadapted to a slot in the bodyportion. This gage plate extends into thespace between the two flanges 12 and holds the screw in a centralposition.

The anvils 14 are identical in form and each anvil is carried bya block4. A transverse tongue 15 on each block enters a groove 16 in its anviland the blocks extend back of the anvils so as to relieve the tonguesfrom strain. The working face of each anvil is shaped, as shown in Fig.5, so as to slightly bevel the teeth from the point 8, Fig. 9, towardthe back as well as toward the gullet, in order to provide the necessaryclearance and to insure a clean cut, but the shape of the working faceof the anvil may be varied according to the type of tooth to be shaped.

In order to adjust the gage plate longitudinally in the body portion 1,I make it as illustrated in Fig. 6. The plate has a slot 17 whichreceives the projecting portion 18 of a stop 19 which extends as a ribfrom the upper surface of the plate 13. The end 20 of this stop restsagainst the point of the saw tooth and acts as a gage for the machine soas to properly aline the anvils opposite the point of a tooth to beshaped. In order to adjust this gage bar longitudinally, I attach ascrew stem 21 to the bar through the medium of a head 22, which isforked and extends over the stop 19 having a projection 23-which entersa notch 21 in the stop, as illustrated in Fig. 2, and a set screw 25,which confines'the head to the screw 21. The screw stem extends into anopening in a projection 26 on the body portion,-as well as through theopenings in the body portion and between the projection and the'bodyportion is a nut 27 and on theopposite side of the projection is a jamnut 28, so that, on turning the nut 27, the gage bar is movedlongitudinally and, after it is moved to the position desired, it can befirmly locked by the lock nut 28. At the opposite side of the bodyportion is an extension 29 having an undercut groove for the gage barwhich projects beyond the end of this extension, and adjustably mountedon the gagebar is'a centering aw 30 having arms which extend on eachsideof the saw. This jaw may be adjusted longitudinally andheld in theadjusted position by a set screw 31 so that the jaws will engage thebody of the saw back of the point of the tooth.

By making the gage bar able,

spaclng.

It will be seen from the above description that I am enabled to locatethe anvils close to the screw and by accurately fitting the; blocks inthe body portion, prevent the binding or locking of the blocks'on thescrew when the anvils are brought toward each other under pressure;stralning of the de vice being avoided.

In F ig. 11, I have illustrated a modifica varied.

I'claim:

1. The combination of a body portion having a transverse openingtherein; two blocks mounted in'the opening and prevented from turningtherein, said blocks having threaded openings; a screw having a rightand a left hand thread, the two threaded portions being spaced apart,the screw extending through the openings in the blocks; a longitudinalguideway in the body portion; and a gage bar mounted in the longitudinalguideway and adapted to engage the saw teeth and extending into thespace between the threadedportions of the screw, whereby the screw isretained in the central position. I

2. The combination of a body portion having a transverse opening and alongitudinal guideway intersecting the transverse openings; two blocksslidablymounted in'the transverse opening; an anvil carried byeachblock, each block having a threaded opening; a screw having a right anda left hand thread adapted to the openings in the blocks, the threadsbeing spaced apart; flanges on the screw; and a gage bar: mounted in thelongitudinal guideway and extendingbetween the flanges of the screwforming a gage for the saw and a lock for the screw.

3. The combination of a body portion having a transverse opening; aplate extending through the opening; two blocks also mounted in theopening and arranged to slide on the plate; an anvil carried by eachblock; a screw having a right hand and a left hand thread extendingthrough the threaded openings in theblocks; and means for turning thescrew to move the anvils toward and from each other.

4. The combination of a body portion having a transverse opening thereinand a longitudinal guideway intersecting the opening; two guide blocksin the transverse and jaw adjustas above described, the device can beapplied to saws having teeth of diflerent opening; an anvil carried byeach guide block; a screw having a right hand and a left hand threadextending through openings in the guide blocks; means for turning thescrew; a slotted gage bar mounted in the guideway; a stop extendingthrough the guide plate and forming. a rib thereon; a screw, a headattached to the screw, stop and guide bar; and a nut confined to thebody portion and arranged to turn on the screw so as to move the gagebar longitudinally. 5. The combination of a body portion 5 having atransverse opening therein and a gage bar mounted in the slot; and anad- 10 justable jaw mounted on the gage bar.

In testimony whereof I have signed my name to this specification in thepresence of tWo subscribing Witnesses.

SAMUEL FREAS.

Witnesses:

E. B. ROBERTS, W. C. BURKHOLDER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of ZPatents, Washington, D. G.

